Tuesday, April 7, 2015

How to enable SSH X11 forwarding in Linux?

How to enable SSH X11 forwarding in Linux?

The  X11 forwarding from putty using Xming was not working, the DISPLAY variable is not set(echo $DISPLAY) after opening the remote server session in putty(X11 forwarding is enabled in putty and also the display is specified as localhost:0.0)

The actual issue is the X11 forwarding was not enabled in remote linux server.

The following steps can be followed to enable the X11 forwarding in linux server.

Login to linux server through putty

vi /etc/ssh/sshd_config

Enable the following flags

AllowAgentForwarding yes
AllowTcpForwarding yes
X11Forwarding yes

Execute the following commands

service sshd restart

yum -y update xauth
yum -y install xauth

Now you will be able to perform X11 forwarding.

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